CN101915950A - Formed body and manufacture method thereof - Google Patents
Formed body and manufacture method thereof Download PDFInfo
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- CN101915950A CN101915950A CN201010257269XA CN201010257269A CN101915950A CN 101915950 A CN101915950 A CN 101915950A CN 201010257269X A CN201010257269X A CN 201010257269XA CN 201010257269 A CN201010257269 A CN 201010257269A CN 101915950 A CN101915950 A CN 101915950A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/18—Diffraction gratings
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/18—Diffraction gratings
- G02B5/1847—Manufacturing methods
- G02B5/1852—Manufacturing methods using mechanical means, e.g. ruling with diamond tool, moulding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00634—Production of filters
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/18—Diffraction gratings
- G02B5/1847—Manufacturing methods
- G02B5/1857—Manufacturing methods using exposure or etching means, e.g. holography, photolithography, exposure to electron or ion beams
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/18—Diffraction gratings
- G02B5/1866—Transmission gratings characterised by their structure, e.g. step profile, contours of substrate or grooves, pitch variations, materials
- G02B5/1871—Transmissive phase gratings
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
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- Ophthalmology & Optometry (AREA)
- Mechanical Engineering (AREA)
- Diffracting Gratings Or Hologram Optical Elements (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Polymerisation Methods In General (AREA)
Abstract
The invention provides a kind of formed body with and manufacture method, described formed body has by the phase separation structure that the optical polymerism composition photopolymerization is formed, and gives sharp-pointed point diffraction with high diffraction efficiency.Described formed body has matrix (2) and a plurality of columnar structures (3), described a plurality of columnar structures (3) is set in the matrix (2), refractive index is different with described matrix (2), it is characterized in that, when the half breadth that irradiation has the intensity distributions of standardized normal distribution and an intensity distributions is 0.5 ° laser beam in the resulting angular spectrum, the half breadth of point diffraction is below 0.6 °, and diffraction efficiency is more than 10%.A plurality of columnar structures (3) roughly are oriented in same direction, and are configured to the grid-like of rule in the face vertical with this orientation direction.
Description
The application is based on dividing an application of following Chinese patent application:
The original bill applying date: on October 31st, 2007
Original bill application number: 2007800378511 (PCT/JP2007/071234)
Original bill application title: formed body and manufacture method thereof
Technical field
The present invention relates to the formed body and the manufacture method thereof of blooming that the optical article as the optical characteristics with diffraction, polarized light, diffusion etc. uses etc.
Background technology
Because the material category that can select in the macromolecular material is abundant and can give diversified function, so in vogue day by day to the trial that macromolecular material is applied to optical applications in recent years.For example, think and to form the formed body of macromolecular material of microtexture of one dimension or two dimension as light control element or optical diffraction element utilization.
As such formed body, known a kind of polymeric membrane, it has a plurality of structures different with the refractive index of matrix and be oriented at unidirectional phase separation structure (with reference to patent documentation 1,2) in macromolecular material matrix.Polymeric membrane with such phase separation structure, its at light on the direction parallel during incident, owing to the configuration of said structure body produces point diffraction with the axis direction of structure.Therefore, such polymeric membrane can be used as incident light is utilized at the optical diffraction element of certain location diffraction with the intensity of regulation.
Patent documentation 1 has been put down in writing film with such structure and preparation method thereof.In patent documentation 1, the light that makes linear light source to the optical polymerism composition irradiation with certain thickness and make the composition polymerization, is made film from the angle of regulation thus.The film of Zhi Zuoing optionally carries out diffraction to the incident light that constitutes specific incident angle like this.
Again, patent documentation 2 has been put down in writing the film with island phase separation structure, and in this film, the island structure of column forms along film thickness direction in extra large structure.
In the method for making of this film, at first, optical polymerism composition thickness is coated on the coated face equably, cover its surface with mask.Irregularly be formed with the pattern that forms a plurality of perforation that island structure uses on this mask.Then, Jie to optical polymerism composition surface irradiation ultraviolet light, forms the column that constitutes island structure by this mask.Like this, behind the formation column, remove mask irradiation ultraviolet radiation again, extra large structure division is solidified.Make film thus.
Patent documentation 1: Japanese patent laid-open 3-284702 communique
Patent documentation 2: Japanese patent laid-open 11-287906 communique
Summary of the invention
The problem that invention will solve
Yet, the film of patent documentation 1 record is owing to be that portion has the film of the rectangular phase separation structure that is parallel to each other within it, though so work as the light control element that transmittance is changed by incident angle, but have only the low systematicness of one dimension as optical diffraction element, do not make the incident light diffraction expeditiously or show the point diffraction of precipitous angular spectrum (angular spectrum).
Again, the film of patent documentation 2 records sees through light scattering, so do not give sharp-pointed point diffraction because the configuration of island structure is random.
Again, known light by opening spreads by diffraction.When the plane wave of the circular open incident wavelength λ of radius a, image planes are distance L apart from opening, will be made as r apart from the distance at the center of image planes, obtain image planes intensity I behind the diffraction by following formula.
I＝(πa
2)
2[2J
1(R)/R]
2…(1)
(R＝2πar/λL)
Again, image planes diffraction light intensity show at first minimum value apart from r
MinAs J
1(R) initial zero point, the r when being R=3.83 try to achieve.The concentration of energy of about 84% in the known light summation is with r
MinIn the circle for radius, r
MinBe target from the diffusion of the diffraction light of circular open.
For example, when the light of wavelength 365nm passes through the circular open of a=1 μ m, L=45 μ m, r
Min=5 μ m.There is the circle of radius 5 μ m to thicken when just this expression is advanced 45 μ m by the light of the circular open of radius 1 μ m.Just, the columnar structures that irradiation by photomask forms the high radius of aspect ratio 1 μ m that only utilize to be situated between is difficult.In patent documentation 2 illustration use photomask to form the example of island structure, but do not consider diffraction of light, can not form the columnar structures of high aspect ratio.Just, in the method for patent documentation 2 records, can not make making light in the pattern of regulation, carry out the film of diffraction with high diffraction efficiency.
As mentioned above, in the past, the polymeric membrane that gives sharp-pointed point diffraction with high diffraction efficiency can not be made by photopolymerization.Therefore, can not use above-mentioned polymeric membrane on optical low-pass filter etc., described optical low-pass filter need make light carry out the optical diffraction plate of diffraction with high diffraction efficiency in the pattern of regulation.
The present invention produces in order to solve above-mentioned problem, and purpose is to provide a kind of formed body and manufacture method thereof, and this formed body has by the phase separation structure that the optical polymerism composition photopolymerization is formed, and gives sharp-pointed point diffraction with high-diffraction efficiency.Another purpose is to provide the optical low-pass filter that uses above-mentioned formed body etc.
Solve the means of problem
The present invention is a kind of formed body, has phase separation structure, described phase separation structure possesses matrix and a plurality of columnar structures, described a plurality of columnar structures is set in the described matrix, refractive index is different with described matrix, it is characterized in that, when the half breadth that irradiation has the intensity distributions of standardized normal distribution and an intensity distributions is 0.5 ° laser beam in the resulting angular spectrum, the half breadth of point diffraction is below 0.6 °, and diffraction efficiency is more than 10%.
Desirable embodiment of the present invention is that described a plurality of columnar structures roughly are oriented in same direction, and are configured to the grid-like of rule in the face vertical with this orientation direction.
Again, desirable embodiment of the present invention is that the cross sectional shape vertical with described orientation direction of described a plurality of columnar structures is roughly the same.
Desirable embodiment of the present invention is that the aspect ratio of described columnar structures is more than 10.
Desirable embodiment of the present invention is that described matrix and described columnar structures are made of the solidfied material of acrylic acid series optical polymerism composition.
Again, optical laminate of the present invention is characterized in that, has above-mentioned formed body and the optical clear film that is bonded on the described formed body.
Again, optical laminate of the present invention is characterized in that, has above-mentioned formed body and supports the glass substrate of this formed body with integrally formed being used for of described formed body.
Again, optical low-pass filter of the present invention is characterized in that, uses above-mentioned optical laminate.
Again, image pickup optical system of the present invention is characterized in that, having fixedly, imaging apparatus is configured in this fixedly above-mentioned optical low-pass filter of the sensitive surface of imaging apparatus with being situated between by wall.
Again, the present invention is a kind of manufacture method of formed body, described formed body has phase separation structure, described phase separation structure possesses matrix and a plurality of columnar structures that is made of optical polymerism composition, described a plurality of columnar structures is set in the described matrix, refractive index is different with described matrix, it is characterized in that, has:
The operation that will contain the optical polymerism composition injection molding mould of photo-curable monomer or oligomer and Photoepolymerizationinitiater initiater;
Configuration has light does not pass through the photomask in zone by zone and light operation between described shaping die and light source;
The 1st rayed operation, from described light source, wavelength full width at half maximum directional light below 100nm, that light intensity distributions is roughly certain, by described photomask, the irradiation of optical polymerism composition in described shaping die makes to be solidified into incomplete solid state by parallel light-struck position in the described optical polymerism composition;
The 2nd rayed operation is taken out described photomask, and the directional light below 100nm, that light intensity distributions is roughly certain of the optical polymerism composition illumination wavelength full width at half maximum in described shaping die is finished the curing of described optical polymerism composition again.
Like this, in the present invention,, has Jie by the 1st rayed operation of photomask irradiation directional light and the 2nd rayed operation of removing photomask irradiation directional light thereafter for the optical polymerism composition that is filled in the shaping die.
In described the 1st rayed operation, the optical polymerism composition that has been shone by directional light is not exclusively solidified by photopolymerization, it is desirable to, make it to be cured to degree of cure 10%～80%, the formation position of decision columnar structures.
This be because, in the 1st rayed operation, because the diffusion that the parallel diffraction of light of the light that has passed through photomask by the zone causes, so light has arrived the matrix that does not need a light-struck part originally in this operation, even WBR directional light in the 2nd rayed operation below can not produce significant refringence yet between matrix and columnar structures.
Therefore, in the present invention, in the 2nd rayed operation, matrix except that columnar structures in optical polymerism composition and columnar structures exist under the not completely crued state of difference of hardness to a certain degree, the WBR directional light is finished whole curing.
Like this, by shining directional light to optical polymerism composition, the composition that reaction diffusion by polymerization self the facilitation effect cross-linking density that cause and matrix of columnar structures between poor and columnar structures and the matrix causes distributes, give between the two significant refringence, can also when manufacturing process, form along high columnar structures of the aspect ratio of the direction of illumination of directional light and phase separation structure clearly.
In desirable embodiment of the present invention, do not dispose a plurality of described light by the zone by what the zone was rule at the described light of described photomask again, grid-likely.Thus, the columnar structures of manufactured formed body formation rule can be made the formed body that half breadth is narrow, give sharp-pointed point diffraction.
The effect of invention
According to the present invention, a kind of formed body and manufacture method thereof can be provided, this formed body has by the phase separation structure that the optical polymerism composition photopolymerization is formed, and gives sharp-pointed point diffraction with high-diffraction efficiency.According to its optical characteristics, above-mentioned formed body can be used for optical low-pass filter etc.
Description of drawings
Fig. 1 is the summary construction diagram of formed body of the present invention;
Fig. 2 is a key diagram of making the shaping die of formed body of the present invention;
Fig. 3 is the vertical view of the photomask that uses in manufacture method of the present invention;
Fig. 4 is the vertical view of the photomask that uses in manufacture method of the present invention;
Fig. 5 is the explanation face of measuring point of the Illumination Distribution of the radiation source that shows that manufacture method of the present invention is used;
Fig. 6 is the key diagram of manufacture method of the present invention;
Fig. 7 is the diagrammatic illustration figure of angular spectrum assay method of the laser diffraction of formed body of the present invention;
Fig. 8 is the figure of the angular spectrum that obtained by formed body of the present invention;
Fig. 9 is to use the key diagram of the image pickup optical system of formed body of the present invention;
Figure 10 is the figure of optical microscope image that shows the formed body of embodiment 1;
Figure 11 is the figure of the laser diffraction image that shows that the formed body of embodiment 1 causes;
Figure 12 is the figure of optical microscope image that shows the formed body of comparative example 1;
Figure 13 is the figure of the laser diffraction image that shows that the formed body of comparative example 1 causes;
Symbol description
1 formed body, 2 matrix
3 columnar structures, 10 shaping dies
11 bodies, 12 outer cover components
20 optical polymerism compositions, 30 radiation sources
40 photomasks
Embodiment
Below, the embodiment that formed body of the present invention is applied to membranaceous optical diffraction element is described.
As shown in Figure 1, formed body 1 has phase separation structure, described phase separation structure possesses matrix 2 and a plurality of columnar structures 3, and described matrix 2 is as the laminal matrix that is made of optical polymerism composition, and described a plurality of columnar structures 3 are the optical polymerism compositions that are set in the described matrix 2.The refractive index of columnar structures 3 is different with matrix 2.Formed body 1 forms roughly certain membranaceous of thickness.
Formed body of the present invention is as the member that is used for optical applications, and normally used film shape is fit to.But formed body of the present invention can suitably be set shape according to its purposes, is not defined as the film shape, can form other shape.For example, formed body can be the different shape of thickness on its length direction.
Each columnar structures 3 has roughly same shape, and its axis is configured to the trigonal lattice palisade of rule along the thickness direction of the formed body 1 of film shape.At length, the cross sectional shape of columnar structures 3 is at the roughly certain cylindrical shape of axis direction, be oriented on the same direction, and the cross sectional shape vertical with axis direction A is set roughly samely the axis direction A almost parallel of a plurality of columnar structures 3.
The orientation direction of columnar structures 3 (axis direction) A is set to the roughly same direction with the thickness direction B of formed body 1, but is not limited thereto, and direction A and direction B can be provided with the angle of regulation.Also have, the cross sectional shape of columnar structures 3 is set to circle, but is not limited thereto, and also can be elliptical shape, rectangular shape etc.
Again, in the face vertical with orientation direction A, a plurality of columnar structures 3 are aligned to the trigonal lattice palisade of rule, but the pattern that a plurality of columnar structures 3 is configured to stipulate gets final product.The pattern of regulation can be the grille-like arbitrarily of square grid shape etc. for example.
Like this, be arranged with the different a plurality of columnar structures 3 of refractive index and matrix 2 with the trigonal lattice palisade of rule in the formed body 1.Therefore, when formed body 1 incident, because the arrangement of columnar structures 3, formed body 1 gives point diffraction to light, works as optical diffraction element from the face direction.
Then, the manufacture method to formed body 1 describes.
About manufacturing body 1, at first, in shaping die 10, inject after the optical polymerism composition 20 configuration photomask 40 (with reference to Fig. 2 to Fig. 6) between radiation source 30 and shaping die 10.Then, be situated between by photomask 40, light is removed photomask 40 from optical polymerism composition 20 irradiations of radiation source 40 in shaping die 10, makes light from optical polymerism composition 20 irradiations of radiation source 30 in shaping die 10 again.Thus, finish the photopolymerization of optical polymerism composition 20.By finishing this photopolymerisable optical polymerism composition 20, can obtain for using the transparent formed body 1 of wavelength from shaping die 10 demouldings.
(shaping die)
According to Fig. 2, the shaping die 10 of the manufacture method that is used for formed body 1 is described.Fig. 2 (a) and (b) are respectively vertical view, the sectional view of the shaping die (box) 10 of filling optical polymerism composition 20.
Shaping die 10 possesses the body 11 of spatial portion (recess) 11a with rectangular shape and the outer cover component 12 of the 11a of covering space portion.Shaping die 10 forms the inner chamber that utilizes spatial portion 11a and be specified in inside by covering body 11 with outer cover component 12.As described later, optical polymerism composition 20 is injected into this inner chamber, and keeps.The optical polymerism composition 20 that is filled in inner chamber it is desirable to not contact with extraneous air, so that polymerization can not hindered when photopolymerization.Therefore, shaping die 10 can be with liquid-tight seal optical polymerism composition 20.
The formed body 1 of the spatial portion 11a of body 11 in order to form the film shape, and make film like or laminal space.Yet spatial portion 11a can make different shape according to the shape of the formed body 1 that is shaped.
Below the material that can be used for optical polymerism composition 20 is described.
(polyfunctional monomer)
It is desirable to contain polyfunctional monomer in the optical polymerism composition 20.As such polyfunctional monomer, the monomer that it is desirable to comprise (methyl) acrylic monomers of (methyl) acryloyl group especially or contain vinyl, allyl etc.
Object lesson as polyfunctional monomer, triethylene glycol two (methyl) acrylate is arranged for example, polyglycol two (methyl) acrylate, neopentyl glycol two (methyl) acrylate, 1,4-butylene glycol two (methyl) acrylate, 1,6-hexanediol two (methyl) acrylate, hydrogenation dicyclopentadienyl two (methyl) acrylate, oxirane modified bisphenol A two (methyl) acrylate, trimethylolpropane tris (methyl) acrylate, pentaerythrite four (methyl) acrylate, tetramethylol methane four (methyl) acrylate, pentaerythrite six (methyl) acrylate, polyfunctional epoxy (methyl) acrylate, polyfunctional polyurethane (methyl) acrylate, divinylbenzene, triallyl cyanurate, triallyl isocyanurate, the trimellitic acid triallyl, diallyl hexachloronadate, N, N-metaphenylene span comes the acid anhydrides imines that contracts, diallyl phthalates etc., these can use separately or use as the potpourri more than 2 kinds.
Especially, the multi-functional monomer that has the polymerism carbon-to-carbon double bond more than 3 in the molecule makes the density of the cross-linking density that degree of polymerization difference causes bigger easily, forms above-mentioned columnar structures easily.
As desirable especially multi-functional monomer, trimethylolpropane tris (methyl) acrylate, pentaerythrite four (methyl) acrylate, tetramethylol methane four (methyl) acrylate, pentaerythrite six (methyl) acrylate are arranged with the polymerism carbon-to-carbon double bond more than 3.
When optical polymerism composition 20 uses kind of above polyfunctional monomer or its oligomer, the different each other material of refractive index when it is desirable to use respectively as polymkeric substance separately, better is the big material of combination refringence.
In order to obtain the function of diffraction, polarized light, diffusion etc. expeditiously, it is bigger to get refringence, it is desirable to its refringence more than 0.01, and better is more than 0.05.Again, because in polymerization process, by the monomer diffusion, it is big that refringence becomes, so it is desirable to the big combination of the difference of diffusion constant.
In addition, when using polyfunctional monomer more than 3 kinds or oligomer, any at least 2 refringence of independent polymkeric substance separately gets final product in above-mentioned scope.Again, in order to obtain the function of high efficiency diffraction, polarized light, diffusion etc., it is desirable to, the operating weight ratio is 2 monomers or the oligomer of refringence maximum of independent polymkeric substance of 10: 90～90: 10 ratio.
(monofunctional monomer)
Except using above-mentioned polyfunctional monomer or oligomer, also can use the monofunctional monomer or the oligomer that have 1 polymerism carbon-to-carbon double bond in the molecule in the optical polymerism composition 20 again.As such monofunctional monomer or oligomer, the monomer that it is desirable to comprise (methyl) acrylic monomers of (methyl) acryloyl group especially or contain vinyl, allyl etc.
Object lesson as monofunctional monomer, for example (methyl) methyl acrylate is arranged for example, (methyl) acrylic acid tetrahydrofurfuryl ester, ethyl carbitol (methyl) acrylate, (methyl) acrylic acid dicyclopentenyl 2-ethoxyethyl acetate, (methyl) isobornyl acrylate, phenyl carbitol (methyl) acrylate, (methyl) acrylic acid Nonylphenoxy ethyl ester, (methyl) acrylic acid-2-hydroxyl-3-phenoxy group propyl ester, succinic acid (methyl) acryloyl group 2-ethoxyethyl acetate, phthalic acid (methyl) acryloyl group oxygen base ethyl ester, (methyl) phenyl acrylate, (methyl) acrylic acid cyano group ethyl ester, (methyl) acrylic acid tribromophenyl, (methyl) acrylic acid phenoxy ethyl, (methyl) acrylic acid tribromophenoxy ethyl ester, (methyl) acrylic acid benzene methyl, (methyl) acrylic acid is to the bromobenzene methyl esters, (methyl) acrylic acid-2-ethyl caproite, (methyl) lauryl acrylate, (methyl) acrylic acid trifluoro ethyl ester, (methyl) acrylic acid-2,2,3, (methyl) acrylate compounds of 3-tetrafluoro propyl ester etc.; The allyl compound of styrene, vinyl compound, ethylene carbonate diene propyl ester, diallyl phthalate, diallyl isophthalate etc. etc. to chlorostyrene, vinyl acetate, vinyl cyanide, N-vinyl pyrrolidone, vinyl naphthalene etc.
Use these monofunctional monomers or oligomer in order to give formed body 1 flexibility, its use amount it is desirable to the scope of 10～99 quality % in the total amount with polyfunctional monomer or oligomer, and better is the scope of 10～50 quality %.
(polymkeric substance, low molecular compound)
Also can use the homogeneous dissolving mixt that contains above-mentioned polyfunctional monomer or oligomer and do not have the compound of polymerism carbon-to-carbon double bond in the optical polymerism composition 20 again.
As the compound that does not have the polymerism carbon-to-carbon double bond, such adjuvant of polymer class, toluene, normal hexane, cyclohexane, acetone, methyl ethyl ketone, methyl alcohol, ethanol, ethyl acetate, acetonitrile, dimethyl acetamide, dimethyl formamide, the tetrahydrofuran of for example polystyrene, polymethylmethacrylate, polyethylene oxide, polyvinylpyrrolidone, polyvinyl alcohol (PVA), nylon etc. such low molecular compound, organohalogen compound, organo-silicon compound, plastifier, stabilizing agent etc. is arranged for example.
In order when manufacturing body 1, to regulate the viscosity of optical polymerism composition 20, make operability good, the monomer component ratio of 20 kinds of optical polymerism compositions is descended, make curable good, and use these not have the compound of polymerism carbon-to-carbon double bond, its use amount it is desirable to into the total amount of polyfunctional monomer or oligomer in the scope of 1～99 quality %, in order to make operability good and form the columnar structures of the arrangement with rule, better is the scope of 1～50 quality %.
(initiating agent)
The Photoepolymerizationinitiater initiater that is used for optical polymerism composition 20, the active energy ray of irradiation ultraviolet radiation etc. carries out employed the getting final product of common photopolymerization of polymerization, there is no particular limitation, benzophenone, benzyl, Michler's keton, 2-chloro thioxanthone, styrax benzyl ethyl ether, diethoxy acetophenone for example arranged for example, to tert-butyl group trichlorobenzene ethyl ketone, benzyl dimethyl ketal, 2-hydroxy-2-methyl propyl group benzophenone, 1-hydroxycyclohexylphenylketone, 2-benzyl-2-dimethylamino-1-(4-morpholino phenyl)-butanone-1, Dibenzosuberone etc.
It is desirable to, the use amount of these Photoepolymerizationinitiater initiaters is the scope of 0.001～10 quality % with respect to the weight of other optical polymerism compositions, and for the transparency that does not make formed body 1 reduces, better is to be 0.01～5 quality %.
Based on Fig. 3～Fig. 6, other devices of the manufacture method that is used for formed body 1 are described again.
(photomask)
In formed body shown in Figure 11, in matrix 2, refractive index and matrix 2 different a plurality of columnar structures 3 are oriented on the same direction, at the face cylindrical structure 3 vertical with its orientation direction with certain pattern arrangement.The structure arbitrary decision that this pattern can bring with photomask 40.
In embodiment,, use texture mapping technology (texturing) as the method for the configuration that determines the columnar structures 3 that refractive index is different.Described here texture mapping technology (texturing) is meant by input position information in advance, brings the method for high systematicness for the regular texture that forms.
As shown in Figure 3, the mask hole 41 of mask 40 is arranged regularly with the trigonal lattice gate pattern.Again, mask hole 41 is not limited to above-mentioned arrangement mode, also can arrange with other pattern.For example, as shown in Figure 4, the photomask 40 that can use mask hole 41 to arrange regularly with the square grid pattern.
In addition, in the present embodiment, the texture mapping technology of using photomask 40 to bring in order to form columnar structures 3, but be not limited thereto also can scan the radioactive ray of laser, X line, γ line etc. of the wavelength band of the visible or ultraviolet region of irradiation and input position information.
(radiation source)
Radiation source 30 (with reference to figure 6) uses the light source of directional light that can irradiation ultraviolet radiation etc. for shaping die 10.The depth of parallelism of light of irradiation it is desirable to extended corner ± below the 0.03rad, better is in ± scope below the 0.001rad.
Again, radiation source 30 uses and can shine light intensity distributions directional light and that can also make directional light roughly certain light source in respect to the direct of travel vertical cross-section of the directional light that shines.Particularly, radiation source 30 can use and will become the roughly flat light source etc. of the VCSEL etc. of the directional light of certain (distribution of box (Ha Star ト) type) of light intensity distributions by mirror or lens etc. from the light of pointolite or bar-shaped light source.
In addition, laser beam is desirable light source aspect the depth of parallelism, but because its light intensity distributions has the distribution of Gaussian, so it is desirable to use appropriate filters etc. that light intensity distributions is roughly necessarily used.
Just, in formed body 1,, need in the plane vertical, polyreaction be carried out equably with the film thickness direction B of formed body 1 for arranging columnar structures 3 with high systematicness.Therefore, the light intensity distributions that makes radiation source 30 is homogeneous roughly in range of exposures.
As shown in Figure 5, irradiation area 31 is divided into a plurality of zones (in the present embodiment, 9 zones), measures the light intensity of the some 31a～31i in each zone, the Illumination Distribution value that radiation source 30 use formulas (2) provide is at the light source below 2.0%.Better is, uses below 1.0%.
Illumination Distribution=(maximal value-minimum value)/(maximal value+minimum value) * 100 ... (2)
(rayed)
In the manufacture method of formed body 1, carry out rayed by 2 rayed operations that constitute by the 1st rayed operation and the 2nd rayed operation.
＜the 1 rayed operation 〉
In the 1st rayed operation, at first, shown in Fig. 6 (a), top (being between shaping die 10 and the radiation source 30) configuration of filling the shaping die 10 of optical polymerism composition 20 determines the photomask 40 that the formation position of columnar structures 3 is used.At this moment, the upper surface almost parallel ground with respect to shaping die 10 (outer cover component 12) disposes photomask 40.In order more critically to control the circle footpath and the spacing of columnar structures, the space that it is desirable between shaping die 10 and the photomask 40 is set in below the 100 μ m.Using the photomask decision to form in the method for position, should be noted that in mask open ultraviolet light generation diffraction this point.By diffraction, form the position and be set in the pattern different with photomask, perhaps pattern deterioration and can not determine to form the position too is so must correctly determine the distance between photomask and the optical polymerism composition.
Then, disposed after the photomask 40, from radiation source 30 irradiation object scope illumination wavelength full width at half maximum below 100nm, the directional light of ultraviolet ray that light intensity distributions is roughly certain etc.Thus, the directional light by photomask 40 is to the patterned illumination of optical polymerism composition 20 with regulation.Like this, in the 1st rayed operation, irradiation is as the light of the ultraviolet ray of directional light etc., is solidified into gel, the formation position of the columnar structures 3 of decision formed body 1 inside up to the directional light irradiated site of optical polymerism composition 20.In this mask exposure, set degree of cure (reflectivity) in optical polymerism composition 20, not forming the degree of phase separation structure.
Particularly, in the 1st rayed operation, for the systematicness and the high-diffraction efficiency of the columnar structures 3 of the formed body 1 that makes manufacturing and deposit, the degree of cure that shines optical polymerism composition 20 is 10%～80% scope, and better is, and to shine degree of cure be 20%～60% scope.
In the present embodiment, though will be in light DSC method optical polymerism composition 20 complete reaction rayed also no longer the state of heating to be used as curing degree be 100%.And, in the 1st rayed operation, optical polymerism composition 20 is carried out the irradiation of ormal weight, be regulation degree of cure (10%～80%) up to the curing degree that calculates by the thermal value in the light DSC method.
＜the 2 rayed operation 〉
After the 1st rayed operation, in the 2nd rayed operation, shown in Fig. 6 (b), remove photomask 40, to shaping die 10 illumination wavelength full width at half maximum directional light below 100nm, that light intensity distributions is roughly certain again.Thus, to optical polymerism composition 20 WBR directional lights, film thickness direction form by the columnar structures 3 that in the 1st rayed operation, has determined to form the position form the position and matrix in addition 2 forms the column phase separation structure that the position constitutes, improve the refringence between matrix 2 and a plurality of columnar structures 3, and finish the curing of optical polymerism composition 20 fully.
At this moment, utilize directional light, form columnar structures 3 in optical polymerism composition 20, it is as clearly column structure is in matrix 2, and it does not spread in the face direction but extends abreast at film thickness direction.Thus, formed body 1 forms on the clear border ground of matrix 2 and columnar structures 3 and change of refractive occurs.By with full solidification photopolymerizable composition 20 from shaping die 10 demouldings, manufacture body 1.
Exploring degree when generally, adjusting the illumination homogeneity of the light that the point source of light of high-pressure mercury-vapor lamp etc. emits or the depth of parallelism and be exposed to photomask by mirror or lens is as follows.The slit width of photomask is made as a, with gap (gap) when being set at L, the light by slit (value of a and L near time) when the size of a can not be ignored with respect to L, Fresnel diffraction is approximate, and the size of a can ignore with respect to L time when L (a＜＜), Fraunhofer diffraction is approximate.Represent the deterioration of the picture that diffraction causes with the function F of formula (3), F is near the boundary that occurred the exploring degree at 2 o'clock.λ is a light wavelength.
F＝a(2/λL)
1/2…(3)
F=2, λ=0.4 o'clock obtains a=0.89L according to formula (3)
1/2This a is an exploring boundary live width.When L was made as the average thickness 150 μ m of outer cover component 12 on box top, the exploring degree was 10.9 μ m.Therefore, because the aperture of columnar structures is desirably 80nm～10 μ m, even so only use photomask to form columnar structures, do not think yet Fraunhofer diffraction (a＜＜deterioration of the picture that L) causes can be fierce, forms aspect ratio in the columnar structures more than 10 in such system in film.
Just, as before, only fully form columnar structures,, be diffused into the zone of matrix from the view field (zone of columnar structures just) of mask hole by the light of photomask by diffraction with the 1st rayed operation.Therefore, as before,, between matrix and columnar structures, can not produce significant refringence even after the 1st rayed operation, carry out the 2nd rayed operation.
Yet, in the present embodiment, in the 1st rayed operation, do not make columnar structures 3 full solidification, and only decision forms the position.And in the 2nd rayed operation,,, make whole full solidification to the WBR directional light existing under the not completely crued state of difference of hardness to a certain degree between matrix 2 and the columnar structures 3.At this moment, by poor by polymerization self facilitation effect of columnar structures 3 cross-linking density that bring and matrix 2 and form distribution by what the reaction between columnar structures 3 and matrix 2 diffusion brought, give significant refringence between the two, can form columnar structures 3 that extend, that aspect ratio is high along the film thickness direction almost parallel ground of formed body 1 again.
The formed body of making 1 is carried out following evaluation.
(calculating of diffraction efficiency)
The laser beam that 1 irradiation has the intensity distributions of standardized normal distribution to the organizator made is measured the intensity of point diffraction, calculates with the incident light integral intensity divided by the value of the mensuration intensity of the point diffraction diffraction efficiency as formed body 1.When a plurality of point diffraction occurring, as with the incident light integral intensity divided by the resulting value of their total intensity.
In the present embodiment, the diffraction efficiency of formed body 1 is (10%≤diffraction efficiency≤100%) more than 10%.
(angular spectrum)
Again, as shown in Figure 7, the laser beam 52 and the surface incident orthogonally of making good formed body 1 that will have the intensity distributions of standardized normal distribution from LASER Light Source 51, one side changes the angle θ of photodiodes 54 with respect to formed body 1 by variable-angle platform 53, on one side by the light intensity that see through light of photodiode 54 mensuration from formed body 1.With incident laser light 52 see through directly advance o'clock as 0 °, transverse axis is got angle θ, the longitudinal axis is got light intensity and is mapped, and obtains angular spectrum as shown in Figure 8.Obtain the half breadth of point diffraction according to this angular spectrum.The systematicness of the configuration of phase separation structure is high more, and then the half breadth at peak is more little.
In the present embodiment, the half breadth of the point diffraction obtained according to angular spectrum of formed body 1 is at (0 °＜half breadth≤0.6 °) below 0.6 °.
(optical low-pass filter)
Formed body 1 can be used for optical low-pass filter.In the camera system of digital camera etc., ripple (false colour) usually becomes problem.Its reason is because the sensor of employed CCD or CMOS etc. is arranged regularly, so interfere with the pattern of the shooting rule that object comprised.As one of means that address this problem the importing optical low-pass filter is arranged.Optical low-pass filter has by the light that will import and is separated into influence that a plurality of points suppress to interfere, suppresses the effect of ripple.
For formed body 1 is used for optical low-pass filter, at first, carry out lamination by bonding optically transparent optical element on formed body 1 (for example, hyaline membrane etc.) etc., perhaps, form optical laminate by being used for being supported to body 1 with glass substrate is integrally formed.This optical laminate since incident light with certain location and intensity generation diffraction, so the angle of diffraction by suitably setting this optical laminate, diffraction efficiency and with the distance of above-mentioned sensor, can be used as optical low-pass filter and play a role.
In one of method for making of sensor is among the wafer stage chip packaged type Wafer Level Chip Size Package (WL-CSP), with the cover glass of the sensor on the bonding covering silicon substrate of tack coat.By using the cover glass of above-mentioned optical laminate as WL-CSP, set the distance with sensor easily, can not damage that WL-CSPDE is small-sized, under the situation of these advantages of high productivity, optical low-pass filter imported in the sensor.According to this method, by the thickness of tack coat, can easily set the distance between optical laminate and the sensor, under the situation of the thickness that can not increase optical system integral body, optical low-pass filter is imported to sensor.
Again, after the formed body 1 that forms integrally formed and the large-area optical laminate of glass, be cut into the size of regulation, the cover glass that the optical laminate that is cut into given size can be used as monolithic sensor uses.
In addition, formed body 1 can be configured in optical system, necessity transparent optical element of laminated optical on formed body 1.
As an example, shown the image pickup optical system 50 that has used formed body 1 among Fig. 9.It is sensor 51, optical laminate 52 and lens 53 that this image pickup optical system 50 possesses solid-state imager.In this example, integrally formed formed body 1 and glass substrate 4 and constitute optical laminate 52 use this optical laminate as optical low-pass filter.This optical laminate 52 is fixed on the sensitive surface of sensor 51 by the tack coat 6 that is configured in peripheral edge portion.Thus, between optical laminate 52 and sensor 51, form the clearance layer of specific thickness.This clearance layer is an air layer.
In addition, in the example of Fig. 9, only the peripheral edge portion at optical laminate 52 disposes tack coat 6, but is not limited to this, can fix optical laminate 52 and sensor 51 at the whole surface configuration tack coat of optical laminate 52.At this moment, clearance layer is a tack coat.
＜silane coupling agent 〉
As with formed body 1 and the integrally formed method of glass substrate, the method for using silane coupling agent to bond is arranged for example.Can be used as compound that silane coupling agent uses and be have with the reactive site (for example generating the position of silanol group) of the inorganic constituents bonding of glass etc. by hydrolysis and with the two compound of the position (for example functional group of (methyl) acryloyl group, epoxy radicals, vinyl, amino etc.) of organic principle reaction, just there is no particular limitation.Again, can use in advance and carry out surface-treated glass substrate, also can make optical polymerism composition contain silane coupling agent with silane coupling agent.
＜removal infrared function 〉
Glass substrate is a normally used unorganic glass etc., and just there is no particular limitation, but sensor needs the revisal visibility when using CCD etc., thus better be function with light of removing near infrared range.
Can give solidfied material and remove infrared function by in optical polymerism composition, adding infrared absorbent again.
＜prevent to reflect
For with formed body 1 as the optical low-pass filter utilization, it is desirable to the surface and have the reflection function of preventing.As preventing the reflection processing, have for example and for example utilize the pressing mold that uses beamwriter lithography method or anodic oxidation Woelm Alumina etc., form the method for micro concavo-convex structure.
Again, have the reflection function of preventing, also can prevent reflectance coating by being coated in surface formation in order to make it.
Below, specifically describe the present invention by embodiment.
(embodiment 1)
In embodiment 1,0.6 mass parts 1-hydroxycyclohexylphenylketone is dissolved in the potpourri that is made of 30 mass parts acrylic acid phenoxy ethyl and 70 mass parts trimethyol propane triacrylates, obtain optical polymerism composition.
In the glass case of optical polymerism composition that obtains with the membranaceous φ of being sealed in 20mm, thickness 0.2mm.The thickness of the glass of shadow surface side is 150 μ m.Then, at glass case top configuration photomask, on this photomask, the light of φ 2 μ m becomes hexahedron grid-like (trigonal lattice palisade) by the zone with 5 μ m spacing arrangement, for the surface from vertical direction with 840mJ/cm
2The ultraviolet directional light that the irradiates light intensity distributions is roughly certain.The degree of cure of the optical polymerism composition of this moment is 40%.
Then, take out photomask, with 6300mJ/cm
2Irradiation ultraviolet directional light makes the optical polymerism composition polymerizing curable, obtains plastic foil.
The optical microphotograph mirror image that in Figure 10, shows plastic foil.From this observation picture, can confirm that columnar structures is arranged regularly in the plastic foil of making.
Again, the half breadth that the Surface Vertical exposure intensity of plastic foil is distributed is 0.5 ° a laser, carries out the evaluation of diffraction pattern.The observation picture of the point diffraction that the phase separation structure of the rule of demonstration polymkeric substance inside causes among Figure 11.According to the angular spectrum of diffraction image, the angular width of a point diffraction (half breadth) well is 0.5 °.Again, diffraction efficiency well is 75%.
(embodiment 2)
That embodiment 2 is degree of cure of making the 1st rayed operation is 1 different with embodiment, degree of cure is made as the example of higher limit (80%).
Among the embodiment 2, will form the optical polymerism composition identical with in the membranaceous glass case that is sealed in φ 20mm, thickness 0.2mm with embodiment 1.The thickness of the glass of shadow surface side is 150 μ m.Then, at glass case top configuration photomask, on this photomask, the light of φ 2 μ m becomes hexahedron grid-like by the zone with 5 μ m spacing arrangement, for the surface from vertical direction with 1400mJ/cm
2The ultraviolet directional light that the irradiates light intensity distributions is roughly certain.The degree of cure of the optical polymerism composition of this moment is 80%.
Then, take out photomask, again with 6300mJ/cm
2Irradiation ultraviolet directional light makes the optical polymerism composition polymerizing curable, obtains plastic foil.
Again, the same with embodiment 1, the half breadth that the Surface Vertical exposure intensity of the plastic foil that obtains is distributed is 0.5 ° a laser, carries out the evaluation of diffraction pattern.Through estimating, observe the point diffraction that the phase separation structure of the rule of polymkeric substance inside causes.According to the angular spectrum of diffraction image, the angular width of a point diffraction is 0.5 °.Again, diffraction efficiency is 60%.
Like this, can know that in embodiment 2, compare with embodiment 1, the half breadth of point diffraction is good, in same degree, diffraction efficiency is bad slightly but be shown as in the good value more than 10%.
In addition, embodiment 2 is the examples that the degree of cure of the 1st rayed operation are made as higher limit 80%.But when being lower limit 10%, also observing and have the point diffraction with 0.5 ° half breadth of degree, confirm that simultaneously diffraction efficiency also is shown as in the good value more than 10% with embodiment 1.
(embodiment 3)
That embodiment 3 is degree of cure of making the 1st rayed operation is 1 different with embodiment, degree of cure is made as near (75%) higher limit, makes the example of the pattern difference (φ 6 μ m, 12 μ m spacings) of the light transmissive region of photomask simultaneously.
In embodiment 3, will form the optical polymerism composition identical with in the membranaceous glass case that is sealed in φ 20mm, thickness 0.2mm with embodiment 1.The thickness of the glass of shadow surface side is 150 μ m.Then, at glass case top configuration photomask, on this photomask, the light of φ 6 μ m becomes hexahedron grid-like by the zone with 12 μ m spacing arrangement, for the surface from vertical direction with 1260mJ/cm
2The ultraviolet directional light that the irradiates light intensity distributions is roughly certain.The degree of cure of the optical polymerism composition of this moment is 75%.
Then, take out photomask, again with 6300mJ/cm
2Irradiation ultraviolet directional light makes the optical polymerism composition polymerizing curable, obtains plastic foil.
Again, the same with embodiment 1, the half breadth that the Surface Vertical exposure intensity of the plastic foil that obtains is distributed is 0.5 ° a laser, carries out the evaluation of diffraction pattern.Through estimating, observe the point diffraction that the phase separation structure of the rule of polymkeric substance inside causes.According to the angular spectrum of diffraction image, the angular width of a point diffraction is 0.5 °.Again, diffraction efficiency is 30%.
Like this, can know that in embodiment 3, compare with embodiment 1, the half breadth of point diffraction is good, in same degree, diffraction efficiency is bad slightly but be shown as in the good value more than 10%.
(embodiment 4)
Embodiment 4 be the 1st rayed operation degree of cure and embodiment 1 same degree (40%), make the pattern of the light transmissive region of photomask not be all the example of square grid shape.
In embodiment 4, will form the optical polymerism composition identical with in the membranaceous glass case that is sealed in φ 20mm, thickness 0.2mm with embodiment 1.The thickness of the glass of shadow surface side is 150 μ m.Then, at glass case top configuration photomask, on this photomask, the light of φ 2 μ m is grid-like with 5 μ m spacing arrangement quadrates by the zone, for the surface from vertical direction with 840mJ/cm
2The ultraviolet directional light that the irradiates light intensity distributions is roughly certain.The degree of cure of the optical polymerism composition of this moment is 30%.
Then, take out photomask, again with 6300mJ/cm
2Irradiation ultraviolet directional light makes the optical polymerism composition polymerizing curable, obtains plastic foil.
Again, the same with embodiment 1, the half breadth that the Surface Vertical exposure intensity of the plastic foil that obtains is distributed is 0.5 ° a laser, carries out the evaluation of diffraction pattern.Through estimating, observe the point diffraction that the phase separation structure of the rule of polymkeric substance inside causes.According to the angular spectrum of diffraction image, the angular width of a point diffraction is 0.5 °.Again, diffraction efficiency is 58%.
Like this, can know that in embodiment 4, compare with embodiment 1, the half breadth of point diffraction is good, in same degree, diffraction efficiency is bad slightly but be shown as and surpass 10% good value.
(comparative example 1)
Comparative example 1 is different with embodiment 1, does not use the 1st rayed operation (perhaps the degree of cure in the 1st rayed operation is 0%) of photomask, only carries out the example of the 2nd rayed operation.
In comparative example 1, will form the optical polymerism composition identical with in the membranaceous glass case that is sealed in φ 20mm, thickness 0.2mm with embodiment 1.The thickness of the glass of shadow surface side is 150 μ m.Then, for the surface from vertical direction with 6300mJ/cm
2The ultraviolet directional light that the irradiates light intensity distributions is roughly certain makes the optical polymerism composition polymerizing curable, obtains plastic foil.
The optical microphotograph mirror image that in Figure 12, shows plastic foil.Can confirm in the plastic foil of making that from this observation picture the systematicness of columnar structures is lower than the plastic foil of embodiment 1.
Again, the half breadth that the Surface Vertical exposure intensity of plastic foil is distributed is 0.5 ° a laser, carries out the evaluation of diffraction pattern.The observation picture of the point diffraction that the phase separation structure of the rule of demonstration polymkeric substance inside causes among Figure 13.According to the angular spectrum of diffraction image, the angular width of a point diffraction is 1.3 °.Again, diffraction efficiency is 24%.
Like this, can know, in comparative example 1, compare that though diffraction efficiency obtains surpassing 10% value, the systematicness of the phase separation structure of rule is low, so the half breadth of point diffraction in angular spectrum is greater than 0.6 ° with embodiment 1.
(comparative example 2)
Comparative example 2 and embodiment be 1 different, finish the example of the curing of columnar structures substantially in the 1st rayed operation.
In comparative example 2, will form the optical polymerism composition identical with in the membranaceous glass case that is sealed in φ 20mm, thickness 0.2mm with embodiment 1.The thickness of the glass of shadow surface side is 150 μ m.
Then, at glass case top configuration photomask, on this photomask, the light of φ 2 μ m becomes hexahedron grid-like by the zone with 5 μ m spacing arrangement, for the surface from vertical direction with 15mJ/cm
2The ultraviolet directional light that the irradiates light intensity distributions is roughly certain.The degree of cure of the optical polymerism composition of this moment is more than 90%.
Then, take out photomask, with 6300mJ/cm
2Irradiation ultraviolet directional light makes the optical polymerism composition polymerizing curable, obtains plastic foil.
Again, the same with embodiment 1, the half breadth that the Surface Vertical exposure intensity of the plastic foil that obtains is distributed is 0.5 ° a laser, carries out the evaluation of diffraction pattern.Through estimating, observe the point diffraction that the phase separation structure of the rule of polymkeric substance inside causes.According to the angular spectrum of diffraction image, the angular width of a point diffraction is 0.5 °.Again, diffraction efficiency is 6%.
Like this, in comparative example 2, though the half breadth of point diffraction is good, with embodiment 1 in same degree, diffraction efficiency does not show good value, less than 10%.
(comparative example 3)
Comparative example 3 and embodiment be 1 different, the thickness of glass of shadow surface is set at the example of 5mm.
In comparative example 3, will form the optical polymerism composition identical with in the membranaceous glass case that is sealed in φ 20mm, thickness 0.2mm with embodiment 1.The thickness of glass of shadow surface side is 5mm.Then, at glass case top configuration photomask, on this photomask, the light of φ 2 μ m becomes hexahedron grid-like by the zone with 5 μ m spacing arrangement, for the surface from vertical direction with 840mJ/cm
2The ultraviolet directional light that the irradiates light intensity distributions is roughly certain.The degree of cure of the optical polymerism composition of this moment is 30%.
Then, take out photomask, again with 6300mJ/cm
2Irradiation ultraviolet directional light makes the optical polymerism composition polymerizing curable, obtains plastic foil.
Again, the same with embodiment 1, the half breadth that the Surface Vertical exposure intensity of the plastic foil that obtains is distributed is 0.5 ° a laser, carries out the evaluation of diffraction pattern.Through estimating, observe the point diffraction that the phase separation structure of the rule of polymkeric substance inside causes.According to the angular spectrum of diffraction image, the angular width of a point diffraction is 0.5 °.Again, diffraction efficiency is 5%.
Like this, in comparative example 3, though the half breadth of point diffraction is good, with embodiment 1 in same degree, diffraction efficiency does not show good value, less than 10%.
(embodiment 5)
Embodiment 5 is with formed body and the integrally formed example of glass substrate.
KBM5103 (3-acryloxy propyl trimethoxy silicane, Shin-Etsu Chemial Co., Ltd make) is diluted in 2.0% the aqueous acetic acid the thin aqueous solution of preparation silane coupling agent.With above-mentioned silane coupling agent the surface of the glass substrate of big or small φ 200mm, thickness 500 μ m is handled, obtain the glass substrate of handling with silane coupling agent.Coating thickness is the identical optical polymerism composition of composition and embodiment 1 of 100 μ m on this glass substrate, the film that uses polyethylene terephthalate system is as the transparent housing member, covers the optical polymerism composition that has been coated with and seals, and obtains shaping die.Then, at this shaping die top configuration photomask, on this photomask, the light of φ 2 μ m becomes hexahedron grid-like by the zone with 5 μ m spacing arrangement, for the surface from vertical direction with 840mJ/cm
2The ultraviolet directional light that the irradiates light intensity distributions is roughly certain.The degree of cure of the optical polymerism composition of this moment is 30%.
Then, take out photomask, again with 6300mJ/cm
2Irradiation ultraviolet directional light makes the optical polymerism composition polymerizing curable, peels off the transparent housing member, obtains the integrally formed optical laminate of formed body and glass substrate.
Again, the same with embodiment 1, the half breadth that the Surface Vertical exposure intensity of the optical laminate that obtains is distributed is 0.5 ° a laser, carries out the evaluation of diffraction pattern.Through estimating, observe the point diffraction that the phase separation structure of the rule of polymkeric substance inside causes.According to the angular spectrum of diffraction image, the angular width of a point diffraction (half breadth) is 0.5 °.Again, diffraction efficiency is 75%.
By using this optical laminate as optical low-pass filter, being situated between is arranged on the solid-state imager by tack coat, can easily determine the position of optical low-pass filter.Make the image pickup optical system of the solid-state imager that uses the optical low-pass filter that is equipped with formation like this, after circle zone plate (circular zone plate) is photographed, can confirm that ripple is suppressed in the zone of containing the high spatial frequency composition.
Claims (11)
1. a formed body has phase separation structure, and described phase separation structure possesses matrix and a plurality of columnar structures, and described a plurality of columnar structures are set in the described matrix, and refractive index is different with described matrix, it is characterized in that,
In the resulting angular spectrum, the half breadth of point diffraction is below 0.6 °, and diffraction efficiency is more than 10% when the half breadth that irradiation has the intensity distributions of standardized normal distribution and an intensity distributions is 0.5 ° laser beam.
2. formed body as claimed in claim 1 is characterized in that, described a plurality of columnar structures roughly are oriented in same direction, and is configured to the grid-like of rule in the face vertical with this orientation direction.
3. formed body as claimed in claim 1 is characterized in that, the cross sectional shape vertical with described orientation direction of described a plurality of columnar structures is roughly the same.
4. formed body as claimed in claim 1 is characterized in that the aspect ratio of described columnar structures is more than 10.
5. formed body as claimed in claim 1 is characterized in that, described matrix and described columnar structures are made of the solidfied material of acrylic acid series optical polymerism composition.
6. formed body as claimed in claim 1 is characterized in that, the spacing of described columnar structures is in the scope of 120nm～15 μ m.
7. formed body as claimed in claim 1 is characterized in that, the aperture of described columnar structures is in the scope of 80nm～10 μ m.
8. an optical laminate is characterized in that, has each described formed body and the optical clear film that is bonded on the described formed body of claim 1～7.
9. an optical laminate is characterized in that, has each described formed body of claim 1～7 and supports the glass substrate of this formed body with integrally formed being used for of described formed body.
10. an optical low-pass filter is characterized in that, uses claim 8 or 9 described optical laminates.
11. an image pickup optical system is characterized in that, has solid-state imager and be situated between to be configured in the described optical low-pass filter of claim 10 of the sensitive surface of this solid-state imager by wall.
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| JP2006296685 | 2006-10-31 | ||
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| US8810910B2 (en) * | 2008-02-27 | 2014-08-19 | Sony Corporation | Antireflection optical device and method of manufacturing master |
| JP2009294600A (en) * | 2008-06-09 | 2009-12-17 | Mitsubishi Rayon Co Ltd | Molded body and method of manufacturing the same |
| JP2010164767A (en) * | 2009-01-15 | 2010-07-29 | Mitsubishi Rayon Co Ltd | Optical low pass filter and method for producing the same |
| CN105242398A (en) * | 2015-10-08 | 2016-01-13 | 鲁东大学 | Hexagon Talbot array illuminator and manufacturing method thereof |
| KR20210068672A (en) * | 2019-12-02 | 2021-06-10 | 에스엘 주식회사 | Optical lens and illuminating device using the same |
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| JPH03284702A (en) | 1990-03-30 | 1991-12-16 | Nippon Sheet Glass Co Ltd | Light diffracting plate and production thereof |
| CA2179853C (en) * | 1995-06-26 | 2007-05-22 | Susumu Suzuki | Laminate |
| JPH11287906A (en) | 1998-04-02 | 1999-10-19 | Sekisui Chem Co Ltd | Optical element |
| JP3811840B2 (en) * | 1999-05-21 | 2006-08-23 | 独立行政法人科学技術振興機構 | Method for creating photonic crystal structure by laser interference |
| JP4830188B2 (en) | 2000-08-31 | 2011-12-07 | 凸版印刷株式会社 | Light diffuser and display device using the same |
| EP1710273B1 (en) | 2004-01-30 | 2014-09-10 | Mitsubishi Rayon Co., Ltd. | Optical component-use molding and production method therefor |
| JP4827164B2 (en) * | 2004-01-30 | 2011-11-30 | 三菱レイヨン株式会社 | Molded body and method for producing the same |
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| WO2008053923A1 (en) | 2008-05-08 |
| KR101178627B1 (en) | 2012-09-07 |
| CN101915950B (en) | 2013-04-03 |
| CN101523245A (en) | 2009-09-02 |
| EP2078969A1 (en) | 2009-07-15 |
| KR20090052387A (en) | 2009-05-25 |
| EP2078969A4 (en) | 2009-11-25 |
| CN101523245B (en) | 2011-02-23 |
| EP2078969B1 (en) | 2013-06-26 |
| TW200831954A (en) | 2008-08-01 |
| KR101245953B1 (en) | 2013-03-26 |
| KR20120091245A (en) | 2012-08-17 |
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